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Finding the Fourth Proportional to 2,607.81, 3,911.72 and 660.01

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Solution

The fourth proportional to 2,607.81, 3,911.72 and 660.01 is: 990.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.81 : 3,911.72 = 660.01 : x
  2. Step 2: Convert to fraction form
    2,607.81/3,911.72 = 660.01/x
  3. Step 3: Cross multiply
    2,607.81x = 3,911.72 × 660.01
  4. Step 4: Simplify right side
    2,607.81x = 2,581,761.24
  5. Step 5: Solve for x
    x = 2,581,761.24/2,607.81
  6. Step 6: Final answer
    x = 990.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.